302 Annals Entomological Society of America [Vol. V,. 
raised about as high as the mesonotum. Its sides are abruptly 
bent downward along a line beginning at the parasidal grooves 
and extending backward and toward the center of the body 
giving this portion the form of a trapezoid whose basal angles 
are equal, with its longest base toward the anterior end of the 
body. The lateral, sharply depressed portion of the scutellum 
narrows quickly as it passes outward and downward and the 
hind wing arises from just behind its outer end while the fore 
wing arises somewhat lateral to its outer end which extends 
forward somewhat below the hinder corners of the notum. 
The mesothoracic pluron is large and lies below the wings. 
The whole surface of this plate is gradually raised to a rounded 
ridge which runs downward and backward through its middle 
and is more or less hairy and coarsely punctured. The anterior 
margin of this plate is indicated by a curved suture running 
downward and slightly forward to the base of the fore coxa 
while its posterior margin is indicated by a suture starting just 
in front of the margin of the posterior wing and running down- 
ward and backward to the highest point of the mesocoxa in 
front of which it forms the anterior edge of the coxal cavity. 
This plate fuses beneath with the mesosternum, no suture being 
present to separate the plates. The anterior margin of the 
mesosternum is formed by the contiguous fore coxe and its 
posterior margin is in part formed by the inner sides of the 
mesocoxal cavities and in part by a free edge between them, 
the two mesocoxal cavities being suddenly separated. The 
intercoxal margin of the mesosternum varies from a nearly 
straight to a more or less curved line with a notch in the middle. 
A longitudinal median line varying in distinctness divides the 
mesosternum into two equal parts. The mesosternum is more 
or less coarsely punctured and haired. 
The postscutellum which lies just behind the scutellum is a. 
similar plate but a little narrower. Its central portion is raised 
to about the same height as the central portion of the scutellum 
and becomes narrow behind and then broadens somewhat, 
close to its hinder margin. Its sides beginning on a line with 
the sides of the scutellum are abruptly bent downward to: 
correspond with the similar portions of the latter plate and its. 
margins running downward and forward nearly parallel, end 
at the base of the posterior wing. The plate is more or less. 
coarsely punctured and haired. 
